Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN FDA hazy on e cigarettes' safety CNN.com Vaping vs. smoking: Long term effects, benefits, and risks The Side Effects and Cancer Risk Associated with Vaping Vaping and the Brain: Effects of Electronic Cigarettes and E Liquid Substances The Journal of Neuropsychiatry and Clinical Neurosciences